generate injectable angular code example

Example 1: angular create a service

>>> ng generate service service_name
or
>>> ng generate service /folder-name/service-name

Example 2: angular injector.create example

using Angular Injector
Internal class in @angular/core, StaticInjector, ReflectiveInjector 
uses resolveAndCreate([ClassNames])
the resolve variable from above resolver.get(ClassName) will give the object.
All this is handled internally when we inform the angular with the providers